Internally adjustable damper



FIG. 1 is a perspective view of an internally adjustable damper showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a front elevational view thereof, shown with the blades of the internally adjustable damper in an alternative position;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a front view of one blade of the damper;

FIG. 8 is a rear view of the blade of FIG. 7; and,

FIG. 9 is an exploded assembly view corresponding to the perspective view of FIG. 1.

The features shown in broken lines, with the exception of the center lines showing the assembly of the fittings in FIG. 9, depict environmental subject matter only and form no part of the claimed design.

The break lines in FIG. 1 and 5-9 depicted by matching curved lines indicate that no particular length is claimed.

The claimed ornamental design is for the overall appearance of an internally adjustable damper for use to adjust the air flow resistance of the damper. 

The ornamental design for an internally adjustable damper, as shown and described. 